2021ApJ...923...90M -
Astrophys. J., 923, 90-90 (2021/December-2)
Highly structured inner planetary system debris around the intermediate age Sun-like star TYC 8830 410 1.
MELIS C., OLOFSSON J., SONG I., SARKIS P., WEINBERGER A.J., KENNEDY G. and KRUMPE M.
Abstract (from CDS):
We present a detailed characterization of the extremely dusty main-sequence star TYC 8830 410 1. This system hosts inner planetary system dust (Tdust ≃ 300 K) with a fractional infrared luminosity of ∼1%. Mid-infrared spectroscopy reveals a strong, mildly crystalline solid-state emission feature. TYC 8830 410 1 (spectral type G9 V) has a 49.5'' separation M4-type companion comoving and co-distant with it, and we estimate a system age of ∼600 Myr. TYC 8830 410 1 also experiences "dipper"-like dimming events as detected by the All-Sky Automated Survey for Supernovae, Transiting Exoplanet Survey Satellite, and characterized in more detail with the Las Cumbres Observatory Global Telescope. These recurring eclipses suggest at least one roughly star-sized cloud of dust orbits the star in addition to assorted smaller dust structures. The extreme properties of the material orbiting TYC 8830 410 1 point to dramatic dust-production mechanisms that likely included something similar to the giant impact event thought to have formed the Earth-Moon system, although hundreds of millions of years after such processes are thought to have concluded in the solar system. TYC 8830 410 1 holds promise to deliver significant advances in our understanding of the origin, structure, and evolution of extremely dusty inner planetary systems.
Abstract Copyright:
© 2021. The American Astronomical Society. All rights reserved.
Journal keyword(s):
Circumstellar disks - Exoplanet systems - Variable stars
VizieR on-line data:
<Available at CDS (J/ApJ/923/90): tablea1.dat>
Simbad objects:
19
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